Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
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This can be due to an internal electrical fault with the Front SAM control unit as this can fail/act up internally causing this issue here needing replaced.I have seen the Front SAM fail in the past before needing replaced for this fault here.
What has to be done from here is to have the fault codes read out/checked to see what codes are set using either a dealers SDS machine plugged into your model or a scan tool that will plug in and communicate with all computers.Once this is done any codes set need diagnosed to locate and repair this issue here.I suspect the SAM control unit may need replaced.I would have the fuses checked as well to make sure they are all o.k.
If the SAM needs replaced this can cost over $500 to have replaced and has to be done by a Mercedes dealer as they have to program the new one to work in your model.
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